Product Spotlight:

Our line of Press-Thru (trade marked) spring and ball plungers have the same dimensions, spring pressures, and materials as our standard press fit product line.
Press-Thru™ Spring and Ball Plungers

Our line of Press-Thru™ spring and ball plungers have the same dimensions, spring pressures, and materials as our standard press fit product line. They are designed without the flange on the nose end to allow for the insertion of the plunger from top or bottom, front or back. Simply press the body through the hole until the plunger is flush with the surface. The body is slightly over sized to fit firmly into the hole. Please contact us for a free sample, or if you need any technical information.

Hex Drive "Short" Extended Travel Steel Spring Plungers
Product Information

Steel bodies are made of 12L14 material with a black oxide finish

Delrin® noses prevent marring of aluminum, brass or other soft materials.

Hex Drive Plungers use a positive drive for insertion and removal.

Plungers may be ordered with or without the locking element. Plungers without locking element are the same price, but are considered "specials" and cannot be returned. We recommend using without the locking element for applications in aluminum.

The locking element holds the plunger body securely in place witout the need for lock nuts or other devices. We recommend a 90° countersink 1/32" larger than the major diameter of the mating thread to prevent damaging the element.

End pressures are given in pounds. Full pressures are the force pounds needed to move the nose to the distance show in "C" column.

To prevent possible spring damage, use of a Northwestern Wrench is recommended when installing from plunger end.


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Hex Drive Short Extended Travel Steel Spring Plungers
Part
Number
Without
Locking Ele.
End Press. - Lbs.
Start
End Press. - Lbs.
Full
A B C DHex Dia.
E
Net lbs
Per 100
Steel Body - Heat Treated Black Oxide Steel Nose
33134H 33134HP 0.5 1.25 6-32 7/16 .062 .046 3/64 1/2
33135H 33135HP 1.0 3.25 8-36 1/2 .093 .070 5/64 1/2
33136H 33136HP 1.0 3.25 8-36 1/2 .093 .070 5/64 1/2
33137H 33137HP 1.25 4.25 10-32 9/16 .125 .093 3/32 1/2
33138H 33138HP 2.0 7.0 1/4-20 5/8 .187 .119 1/8 1/2
33139H 33139HP 2.0 9.0 5/16-18 23/32 .187 .135 5/32 1
33140H 33140HP 3.0 12.5 3/8-16 29/32 .187 .186 3/16 2
33141H 33141HP 3.5 19.0 1/2-13 1-3/64 .250 .248 1/4 4
33142H 33142HP 4.5 33.5 5/8-11 1-3/8 .312 .310 5/16 8
Steel Body - Brown Delrin® Nose
33034H 33034HP 0.5 1.25 6-32 7/16 .062 .046 3/64 1/2
33035H 33035HP 1.0 3.25 8-36 1/2 .093 .070 5/64 1/2
33036H 33036HP 1.0 3.25 8-36 1/2 .093 .070 5/64 1/2
33037H 33037HP 1.25 4.25 10-32 9/16 .125 .093 3/32 1/2
33038H 33038HP 2.0 7.0 1/4-20 5/8 .187 .119 1/8 1/2
33039H 33039HP 2.0 9.0 5/16-18 23/32 .187 .135 5/32 1
33040H 33040HP 3.0 12.5 3/8-16 29/32 .187 .186 3/16 1-1/2
33041H 33041HP 3.5 19.0 1/2-13 1-3/64 .250 .248 1/4 3-1/2
33042H 33042HP 4.5 33.5 5/8-11 1-3/8 .312 .310 5/16 6-1/2